BEFCO D90-060, Руководство оператора

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machine at a speed of 1 mph. When mowing light grass, a speed of approximately 4
mph will work best. Only a test run will enable you to gauge the optimal working speed
for your conditions. As a rule of thumb, and if the conditions permit, grass dispersion is
increased by higher ground speeds.
In order to obtain the best cut possible, always keep the tractor rpm up to the speed
indicated on the shredder. When increasing or decreasing shredding ground speed,
always use gear selection, not engine speed. This will maintain the constant maximum
blade speed necessary for a clean cut.
CAUTION: Do not operate this shredder faster than 6 mph. Serious damage can
occur to the machine and/or the operator.
3.08 - Operating Techniques
All of the following factors are important in selecting the proper forward speed:
1. Height of grass.
2. Type of grass.
3. Density of grass.
4. Type of terrain.
5. Grass condition, wet or dry.
For the best results, try cutting the grass at least once per week during growing season.
Tall, dense grass should be cut at low speed, while thin medium grass can be cut at a
faster ground speed.
Always operate PTO at 540 rpm. This is necessary to maintain proper blade speed and
obtain a clean cut.
Under certain conditions, tractor tires may roll some grass down and prevent it from
being cut at the same height as the surrounding area. If this occurs reduce the tractor
ground speed but maintain a 540 rpm engine speed. The lower ground speed will permit
the grass to at least partially rebound. Under some conditions grass will not rebound
enough to be cut even, resulting in an uneven appearance. In general, lower cutting
height gives a more even cut with less tendency to leave tire tracks. If cut is still not
satisfactory, cut the area twice.
Mow extremely tall grass twice. On the first pass use a high cutting height. On the
second pass, position the shredder at the desired height and, when practical, mow at a
right angle of travel to the first pass.
Plan your pattern to travel straight forward whenever possible.
It is better to cut grass more often, than too short. Short grass deteriorates rapidly in hot
weather and invites weed growth during growing season.
If at any time the shredder should jam resulting in belt slippage of 2 or more seconds,
raise the shredder and continue for 2-3 minutes. This will allow the pulleys to cool and
prolong belt life.
O
PERATION
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BEFCO
D
ESTROYER
D90 O
PERATOR
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M
ANUAL